Interesting, that one does sound more similar to "Skogsrået"[1]. With the possible exception that Skogsrået was very beautiful, as long as you didn't see her from behind. Apparently there were many different creatures watching over the forest in Scandinavia and the rest of Europe.
Must be something with old Indo-European roots (or even older than that), because we have something very similar in Romanian folklore, it's called Muma Pădurii (literally translated as Forrest Mother). From wikipedia [1] (very rough translation by me):
> Muma Pădurii is a Romanian mythology character which is often present in Romanian fairy-tales. According to Romanian folk tradition she is an ugly witch, who lives alone, deep in the forrest and she scares people. It looks like she is also present in the Slav folk-tales under the name of Baba Yaga
As that wiki quote says, the Slavic people have something similar under the name of Baba Yaga [2]
[1] https://ro.wikipedia.org/wiki/Muma_P%C4%83durii
[2] https://en.wikipedia.org/wiki/Baba_Yaga